find all the zeros of Xcube-Xsq-4x+4 if one of its zero is -2

Asked by  | 24th May, 2009, 10:44: AM

Expert Answer:

x3 - x2 -4x + 4 = x2 (x-1) -4 (x-1)

                         = (x2 - 4) (x-1)

                        = (x-2) (x+2) (x-1)

So the zeroes are x = 2, x = -2 and x = 1

Answered by  | 26th May, 2009, 04:25: PM

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